| Spring Description | PAC 1518 | |||||||
| Rated Install Height | 1.8 | Max Lift | Spring Rate Slope | |||||
| Coil Bind Height | 1.15 | 0.65 | 3.18 | |||||
| Rated Seat Pressure | 130 | Load Increase | ||||||
| Coil Bind Pressure | 337 | 207 | ||||||
| Spring Rate | 313 | 318.4615385 | ||||||
| Rocker Ratio | 1.6 | 1.7 | 1.8 | 1.84 | 1.9 | |||
| Engine Installed Height | 1.8 | |||||||
| Slope | 3.184615385 | 5.095384615 | 5.413846154 | 5.732307692 | 5.859692308 | 6.050769231 | ||
| Install Height | PSI @ Valve | PSI @ Cam 1.6 | PSI @ Cam 1.7 | PSI @ Cam 1.8 | PSI @ Cam 1.84 | PSI @ Cam 1.9 | Valve Lift | Lobe Lift |
| 1.85 | 114.0769231 | 182.5230769 | 193.9307692 | 205.3384615 | 209.9015385 | 216.7461538 | ||
| 1.84 | 117.2615385 | 187.6184615 | 199.3446154 | 211.0707692 | 215.7612308 | 222.7969231 | ||
| 1.83 | 120.4461538 | 192.7138462 | 204.7584615 | 216.8030769 | 221.6209231 | 228.8476923 | ||
| 1.82 | 123.6307692 | 197.8092308 | 210.1723077 | 222.5353846 | 227.4806154 | 234.8984615 | ||
| 1.81 | 126.8153846 | 202.9046154 | 215.5861538 | 228.2676923 | 233.3403077 | 240.9492308 | ||
| 1.80 | 130 | 208 | 221 | 234 | 239.2 | 247 | 0.000 | 0.000 |
| 1.79 | 133.1846154 | 213.0953846 | 226.4138462 | 239.7323077 | 245.0596923 | 253.0507692 | 0.010 | 0.006 |
| 1.78 | 136.3692308 | 218.1907692 | 231.8276923 | 245.4646154 | 250.9193846 | 259.1015385 | 0.020 | 0.013 |
| 1.77 | 139.5538462 | 223.2861538 | 237.2415385 | 251.1969231 | 256.7790769 | 265.1523077 | 0.030 | 0.019 |
| 1.76 | 142.7384615 | 228.3815385 | 242.6553846 | 256.9292308 | 262.6387692 | 271.2030769 | 0.040 | 0.025 |
| 1.75 | 145.9230769 | 233.4769231 | 248.0692308 | 262.6615385 | 268.4984615 | 277.2538462 | 0.050 | 0.031 |
| 1.74 | 149.1076923 | 238.5723077 | 253.4830769 | 268.3938462 | 274.3581538 | 283.3046154 | 0.060 | 0.038 |
| 1.73 | 152.2923077 | 243.6676923 | 258.8969231 | 274.1261538 | 280.2178462 | 289.3553846 | 0.070 | 0.044 |
| 1.72 | 155.4769231 | 248.7630769 | 264.3107692 | 279.8584615 | 286.0775385 | 295.4061538 | 0.080 | 0.050 |
| 1.71 | 158.6615385 | 253.8584615 | 269.7246154 | 285.5907692 | 291.9372308 | 301.4569231 | 0.090 | 0.056 |
| 1.70 | 161.8461538 | 258.9538462 | 275.1384615 | 291.3230769 | 297.7969231 | 307.5076923 | 0.100 | 0.063 |
| 1.69 | 165.0307692 | 264.0492308 | 280.5523077 | 297.0553846 | 303.6566154 | 313.5584615 | 0.110 | 0.069 |
| 1.68 | 168.2153846 | 269.1446154 | 285.9661538 | 302.7876923 | 309.5163077 | 319.6092308 | 0.120 | 0.075 |
| 1.67 | 171.4 | 274.24 | 291.38 | 308.52 | 315.376 | 325.66 | 0.130 | 0.081 |
| 1.66 | 174.5846154 | 279.3353846 | 296.7938462 | 314.2523077 | 321.2356923 | 331.7107692 | 0.140 | 0.088 |
| 1.65 | 177.7692308 | 284.4307692 | 302.2076923 | 319.9846154 | 327.0953846 | 337.7615385 | 0.150 | 0.094 |
| 1.64 | 180.9538462 | 289.5261538 | 307.6215385 | 325.7169231 | 332.9550769 | 343.8123077 | 0.160 | 0.100 |
| 1.63 | 184.1384615 | 294.6215385 | 313.0353846 | 331.4492308 | 338.8147692 | 349.8630769 | 0.170 | 0.106 |
| 1.62 | 187.3230769 | 299.7169231 | 318.4492308 | 337.1815385 | 344.6744615 | 355.9138462 | 0.180 | 0.113 |
| 1.61 | 190.5076923 | 304.8123077 | 323.8630769 | 342.9138462 | 350.5341538 | 361.9646154 | 0.190 | 0.119 |
| 1.60 | 193.6923077 | 309.9076923 | 329.2769231 | 348.6461538 | 356.3938462 | 368.0153846 | 0.200 | 0.125 |
| 1.59 | 196.8769231 | 315.0030769 | 334.6907692 | 354.3784615 | 362.2535385 | 374.0661538 | 0.210 | 0.131 |
| 1.58 | 200.0615385 | 320.0984615 | 340.1046154 | 360.1107692 | 368.1132308 | 380.1169231 | 0.220 | 0.138 |
| 1.57 | 203.2461538 | 325.1938462 | 345.5184615 | 365.8430769 | 373.9729231 | 386.1676923 | 0.230 | 0.144 |
| 1.56 | 206.4307692 | 330.2892308 | 350.9323077 | 371.5753846 | 379.8326154 | 392.2184615 | 0.240 | 0.150 |
| 1.55 | 209.6153846 | 335.3846154 | 356.3461538 | 377.3076923 | 385.6923077 | 398.2692308 | 0.250 | 0.156 |
| 1.54 | 212.8 | 340.48 | 361.76 | 383.04 | 391.552 | 404.32 | 0.260 | 0.163 |
| 1.53 | 215.9846154 | 345.5753846 | 367.1738462 | 388.7723077 | 397.4116923 | 410.3707692 | 0.270 | 0.169 |
| 1.52 | 219.1692308 | 350.6707692 | 372.5876923 | 394.5046154 | 403.2713846 | 416.4215385 | 0.280 | 0.175 |
| 1.51 | 222.3538462 | 355.7661538 | 378.0015385 | 400.2369231 | 409.1310769 | 422.4723077 | 0.290 | 0.181 |
| 1.50 | 225.5384615 | 360.8615385 | 383.4153846 | 405.9692308 | 414.9907692 | 428.5230769 | 0.300 | 0.188 |
| 1.49 | 228.7230769 | 365.9569231 | 388.8292308 | 411.7015385 | 420.8504615 | 434.5738462 | 0.310 | 0.194 |
| 1.48 | 231.9076923 | 371.0523077 | 394.2430769 | 417.4338462 | 426.7101538 | 440.6246154 | 0.320 | 0.200 |
| 1.47 | 235.0923077 | 376.1476923 | 399.6569231 | 423.1661538 | 432.5698462 | 446.6753846 | 0.330 | 0.206 |
| 1.46 | 238.2769231 | 381.2430769 | 405.0707692 | 428.8984615 | 438.4295385 | 452.7261538 | 0.340 | 0.213 |
| 1.45 | 241.4615385 | 386.3384615 | 410.4846154 | 434.6307692 | 444.2892308 | 458.7769231 | 0.350 | 0.219 |
| 1.44 | 244.6461538 | 391.4338462 | 415.8984615 | 440.3630769 | 450.1489231 | 464.8276923 | 0.360 | 0.225 |
| 1.43 | 247.8307692 | 396.5292308 | 421.3123077 | 446.0953846 | 456.0086154 | 470.8784615 | 0.370 | 0.231 |
| 1.42 | 251.0153846 | 401.6246154 | 426.7261538 | 451.8276923 | 461.8683077 | 476.9292308 | 0.380 | 0.238 |
| 1.41 | 254.2 | 406.72 | 432.14 | 457.56 | 467.728 | 482.98 | 0.390 | 0.244 |
| 1.40 | 257.3846154 | 411.8153846 | 437.5538462 | 463.2923077 | 473.5876923 | 489.0307692 | 0.400 | 0.250 |
| 1.39 | 260.5692308 | 416.9107692 | 442.9676923 | 469.0246154 | 479.4473846 | 495.0815385 | 0.410 | 0.256 |
| 1.38 | 263.7538462 | 422.0061538 | 448.3815385 | 474.7569231 | 485.3070769 | 501.1323077 | 0.420 | 0.263 |
| 1.37 | 266.9384615 | 427.1015385 | 453.7953846 | 480.4892308 | 491.1667692 | 507.1830769 | 0.430 | 0.269 |
| 1.36 | 270.1230769 | 432.1969231 | 459.2092308 | 486.2215385 | 497.0264615 | 513.2338462 | 0.440 | 0.275 |
| 1.35 | 273.3076923 | 437.2923077 | 464.6230769 | 491.9538462 | 502.8861538 | 519.2846154 | 0.450 | 0.281 |
| 1.34 | 276.4923077 | 442.3876923 | 470.0369231 | 497.6861538 | 508.7458462 | 525.3353846 | 0.460 | 0.288 |
| 1.33 | 279.6769231 | 447.4830769 | 475.4507692 | 503.4184615 | 514.6055385 | 531.3861538 | 0.470 | 0.294 |
| 1.32 | 282.8615385 | 452.5784615 | 480.8646154 | 509.1507692 | 520.4652308 | 537.4369231 | 0.480 | 0.300 |
| 1.31 | 286.0461538 | 457.6738462 | 486.2784615 | 514.8830769 | 526.3249231 | 543.4876923 | 0.490 | 0.306 |
| 1.30 | 289.2307692 | 462.7692308 | 491.6923077 | 520.6153846 | 532.1846154 | 549.5384615 | 0.500 | 0.313 |
| 1.29 | 292.4153846 | 467.8646154 | 497.1061538 | 526.3476923 | 538.0443077 | 555.5892308 | 0.510 | 0.319 |
| 1.28 | 295.6 | 472.96 | 502.52 | 532.08 | 543.904 | 561.64 | 0.520 | 0.325 |
| 1.27 | 298.7846154 | 478.0553846 | 507.9338462 | 537.8123077 | 549.7636923 | 567.6907692 | 0.530 | 0.331 |
| 1.26 | 301.9692308 | 483.1507692 | 513.3476923 | 543.5446154 | 555.6233846 | 573.7415385 | 0.540 | 0.338 |
| 1.25 | 305.1538462 | 488.2461538 | 518.7615385 | 549.2769231 | 561.4830769 | 579.7923077 | 0.550 | 0.344 |
| 1.24 | 308.3384615 | 493.3415385 | 524.1753846 | 555.0092308 | 567.3427692 | 585.8430769 | 0.560 | 0.350 |
| 1.23 | 311.5230769 | 498.4369231 | 529.5892308 | 560.7415385 | 573.2024615 | 591.8938462 | 0.570 | 0.356 |
| 1.22 | 314.7076923 | 503.5323077 | 535.0030769 | 566.4738462 | 579.0621538 | 597.9446154 | 0.580 | 0.363 |
| 1.21 | 317.8923077 | 508.6276923 | 540.4169231 | 572.2061538 | 584.9218462 | 603.9953846 | 0.590 | 0.369 |
| 1.20 | 321.0769231 | 513.7230769 | 545.8307692 | 577.9384615 | 590.7815385 | 610.0461538 | 0.600 | 0.375 |